QC/T 639-2004 English PDF (QCT639-2004)

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QC/T 639-2004: Rubber weatherstrips for automobile
QC/T 639-2004
AUTOMOTIVE INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
Replacing QC/T 639-2000, QC/T 640-2000
Rubber Weatherstrips for Automobile
ISSUED ON: OCTOBER 20, 2004
IMPLEMENTED ON: APRIL 01, 2005
Issued by: National Development and Reform Commission
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Requirements ... 5
4 Test Methods ... 9
5 Inspection Rules ... 11
6 Marking, Package, Transportation and Storage ... 13
Appendix A (Normative) Corrosivity Test Method of Rubber Weatherstrips ... 15
Appendix B (Normative) Low-Temperature Property Test Method of Rubber
Weatherstrips ... 18
Appendix C (Normative) Test Method for Breakout Force between Dense
Rubber and Sponge Rubber of Rubber Weatherstrips ... 20
Appendix D (Normative) Test Method for Binding Force between Connector
and Connection Angle of Rubber Weatherstrips ... 23
Appendix E (Informative) Classification of Rubber Weatherstrips for
Automobile ... 25
Foreword
This Standard replaced QC/T 639-2000 Buses - Rubber Sealing Strips of Doors and
Windows, and QC/T 640-2000 Buses – Flocking Sealing Strips of Doors and Windows.
Compared with QC/T 639-2000 and QC/T 640-2000, this Standard has the major
changes as follows:
--- Combine the two standards into the one standard; change the standard name
into Rubber Weatherstrips for Automobile;
--- Add the Appendixes A, B, C, D and E.
--- Add product length table without tolerance;
--- Add “corrosivity”, “water resistance” items to the properties of the rubber;
--- Delete “tear performance” item from the properties of the rubber;
--- Add three hardness range of the rubber of 50±5, 80±5, 90±5 to the properties of
the rubber; and improve the original index;
--- Replace the expression of oxygen concentration of ppm by 10-6;
--- Add 11 items for the performance of the finished products; and the corresponding
standards of the test methods.
Appendixes A, B, C, and D of this Standard are normative; while Appendix E is
informative.
This Standard was proposed by National Technical Committee for Standardization of
Automobile.
This Standard shall be under the jurisdiction of National Technical Committee for
Standardization of Automobile.
Drafting organizations of this Standard: Shanghai SAIC-METZELER Sealing Systems
Co., Ltd.; Beijing Wanyuan Gdx Automotive Sealing Products Co., Ltd.; Guizhou
Guihang Automobile Parts Co., Ltd. Hongyang Seal Components Corporation; Tianjin
Xingguang Rubber Plastic Co., Ltd.; Chongqing Yifeng Automobile Sealing Strips Co.,
Ltd.; Xiamen Baiji Sealing Element Co., Ltd.; and Hubei Konx Automobile Sealing
Strips Co., Ltd.
Chief drafting staffs of this Standard: Chen Haiyan, Ma Junli, Hu Zhugeng, Hao Jie,
Deng Mingxiang, He Wenbing, and Yu Gangli.
Rubber Weatherstrips for Automobile
1 Scope
This Standard specifies the technical requirements, test methods, inspection rules,
marking, package, transportation and storage of rubber weatherstrips for automobile.
This Standard is applicable to the various weatherstrips for automobile manufactured
by the base material of EPDM rubber.
2 Normative References
The provisions in following documents become the provisions of this Standard through
reference in this Standard. For dated references, the subsequent amendments
(excluding corrigendum) or revisions do not apply to this Standard, however, parties
who reach an agreement based on this Standard are encouraged to study if the latest
versions of these documents are applicable. For undated references, the latest edition
of the referenced document applies.
GB/T 528-1998 Rubber, Vulcanized or Thermoplastic - Determination of Tensile
Stress-Strain Properties (eqv ISO 37:1994)
GB/T 531-1999 Rubber - Determination of Indentation Hardness by Means of
Pocket Hardness Meters (idt ISO 7619:1986)
GB/T 1682-1994 Rubber, Vulcanized - Determination of Low-Temperature
Brittleness (Single Test Piece Method) (eqv ISO 812:1991)
GB/T 2828.1-2003 Sampling Procedures for Inspection by Attribute – Part 1:
Sampling Schemes Indexed by Acceptance Quality Limit (AQL) for Lot-by-Lot
Inspection (idt ISO 2859-1:1999)
GB/T 2941-1991 Standard Temperature, Humidity and Time for Environmental
Regulation and Testing of Rubber Samples (eqv ISO 471:1983)
GB/T 3511-2001 Rubber, Vulcanized and Thermoplastic - The Test Method of
Resistance to Direct Natural Weathering (neq ISO 4665:1998)
GB/T 3512-2001 Rubber, Vulcanized or Thermoplastic - Accelerated Ageing and
Heat Resistance Tests - Air-Oven Method (eqv ISO 188:1998)
GB/T 3672.1-2002 Rubber - Tolerances of Products - Part 1: Dimensional
Tolerances (idt ISO 3302-1:1996)
GB/T 5721-1993 General Rules of Identification, Packaging, Transportation and
Storage for Rubber Sealing Products
GB/T 7759-1996 Rubber, Vulcanized or Thermoplastic - Determination of
Compression Set at Ambient Elevated or Low Temperatures (eqv ISO 815:1991)
GB/T 7762-2003 Rubber, Vulcanized or Thermoplastic - Resistance to Ozone
Cracking - Static Strain Test (eqv ISO 1431-1:1989)
GB/T 8170-1987 Rules of Rounding off for Numerical Values
GB/T 9868-1988 Rubber - General Directions for Achieving Elevated or
Subnormal Temperatures for Test Purposes (idt ISO 3383-1985)
GB/T 12831-1991 Rubber, Vulcanized - Test Method of Resistance to Artificial
Weathering (Xenon Lamp) (neq ISO 4665-3:1987)
GB/T 19243-2003 Rubber, Vulcanized or Thermoplastic - Methods of Test for
Staining in Contact with Organic Material (idt ISO 3865:1997)
HG/T 2369-1992 Technical Conditions on Rubber Plastic Tensile Testing Machine
HG/T 3055-1988(1997) Latex Foam - Determination of Apparent Density (eqv ISO
845:1997)
HG/T 3090-1987(1997) General Rules of Visual Quality for Moulded and Extruded
Rubber Products
QC/T 709-2004 Test Method of Compression Set for Automobile Weatherstrips
QC/T 710-2004 Test Method of Compression Load for Automobile Weather-Strips
QC/T 711-2004 Test Method of Abrasion of Flock for Automotive Weather-Strips
QC/T 716-2004 Retention Strength and Insertion Resistance Test Method for
Automobile Weatherstrips
3 Requirements
3.1 General requirements
The weatherstrips shall be manufactured in accordance with technical document
approved by the specified procedures. If the user has other special requirements, it
shall be determined through the negotiation between the supplier and the purchaser.
3.2 Appearance
3.2.1 The appearance for the dense rubber of the weatherstrips shall conform to the
relevant provisions of HG/T 3090-1987(1997). The appearance for the sponge rubber
shall be free of the defects that may affect the appearance and use performance of the
products, such as bubbles, cracked skin, broken skin, lack of rubber, etc.
3.2.2 The flocked surface is evenly flocked; the surface is clean, no stains; and the
substrate is not allowed to be exposed.
3.2.3 The special requirements shall meet the requirements of the approved sealed
sample or sample determined through the negotiation between the supplier and the
purchaser.
3.3 Specification size
3.3.1 The shape and size of the cross-section of product shall be within the tolerance
range of control chart with a magnification of 10. If the drawings have no explicit
requirements, it can be performed as per GB/T 3672.1-2002.
3.3.2 The length size and tolerance of the products shall conform to the relevant
provisions of the product drawings. The tolerance that is not indicated ...